title: Subacute casemix classification for stroke rehabilitation in Australia. How well does AN-SNAP v2 explain variance in outcomes?
abstract: OBJECTIVE
  We sought the best predictors for length of stay, discharge destination and functional improvement for inpatients undergoing rehabilitation following a stroke and compared these predictors against AN-SNAP v2.
  
  
  METHODS
  The Oxfordshire classification subgroup, sociodemographic data and functional data were collected for patients admitted between 1997 and 2007, with a diagnosis of recent stroke. The data were factor analysed using Principal Components Analysis for categorical data (CATPCA). Categorical regression analyses was performed to determine the best predictors of length of stay, discharge destination, and functional improvement.
  
  
  RESULTS
  A total of 1154 patients were included in the study. Principal components analysis indicated that the data were effectively unidimensional, with length of stay being the most important component. Regression analysis demonstrated that the best predictor was the admission motor FIM score, explaining 38.9% of variance for length of stay, 37.4%.of variance for functional improvement and 16% of variance for discharge destination.
  
  
  CONCLUSIONS
  The best explanatory variable in our inpatient rehabilitation service is the admission motor FIM. AN- SNAP v2 classification is a less effective explanatory variable. This needs to be taken into account when using AN-SNAP v2 classification for clinical or funding purposes.
authors.affiliation: Braeside Hospital, Locked Bag 82, Wetherill Park, NSW 2164, Australia.
authors.forename: Friedbert
authors.initials: F
authors.lastname: Kohler
authors.forename: Roger
authors.initials: R
authors.lastname: Renton
authors.forename: Hugh G
authors.initials: HG
authors.lastname: Dickson
authors.forename: John
authors.initials: J
authors.lastname: Estell
authors.forename: Carol E
authors.initials: CE
authors.lastname: Connolly
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001315:Australia; D003953:Diagnosis-Related Groups; D005260:Female; D005544:Forecasting; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D020127:Recovery of Function; D012189:Retrospective Studies; D020521:Stroke / Q000145:classification*; D000071939:Stroke Rehabilitation; D055815:Young Adult